Cluster incandescent lamp.



T. J. LITLE, JR. GLUS'IER4 INGANDESCENT LAMP. APPLICATION FILED MAY- 6,

Patented Man-16,1915.

2 SHEETS-SHEET 1.

wlrNEssEs THE MORRIS PETERS CO., PHO'IU-LITHO., WAS`HINGTON, D. C`

THOMAS JAMES LITLE, JR., OF WOODBURY, NEW JERSEY, rASSIGN'OR TO WELSBACLIGHT COMPANY, OF GLOUCESTER CITY, NEW JERSEY, A CORPORATION 0F NEWJERSEY.

CLUSTER INCANDES'CEN T LAMP.

Specification of Letters Patent.

Patented Mar.. 16, 1915.

Application filed May 6, 1914. Serial No. 836,663.

T0 all @07mm t may concern Be it known that I, THOMAS J. LITLE, J r., acitizen of the United States, residing at Woodbury, Gloucester county,State of New Jersey, have invented a new and useful Improvement inCluster Incandescent Lamps, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,forming part of this speciication, in which: Y

Figure 1 is a central vertical section of a lamp constructed inaccordance with my invention. Fig. 2 is an enlarged sectional view ofthe valve, and Figs. 3 and 4 are cross sections of the valve on the lineIII-III of Fig. 2, showing it in open and closed position, respectively.

My invention relates to the class of cluster incandescent lamps forusing inverted mantles and is designed to provide an improved lainp ofthis character.

The invention relates particularly to the cock control mechanism as Wellas to the Bunsen type arrangement and gas supply connection therefor,arranged within the globe. In this type of lamp the question of the cockcontrol has been a difficult one, as these lamps are usually hung abovethe reach of the operator and the valves have been usually operated bydepending chains secured to the valve lever.

My invention is designed to improve the cock and provide for movement ofits movable member through a plane at right' angles to the axis of thepipe which it controls.

It is also designed to do away with the springs used for keeping thevalve tight as well as to give easy access to the parts.

In the drawings, 2 represents a dependinggas supply channel which may bescrewed up into the gas supply pipe and is provided with a stationaryfrusto-conical plug section 3 having a -transverse closing web 4.Through the side of the casting, holes 5 and 6 open outwardly above andbelow the web 4 and on this stationary frusto-conical plug fit-s thehorizontal movable valve casing 7 having a corresponding frusto-conicalinterior surface fitting on the plug. This casing is cut or grooved out,as shown at 8, so

' that this cut out portion may register with the holes 5 and 6 in oneposition, as shown in Fig. 3, thus allowing the gas to flow. This casingrests by gravity on the frustoconical plug and the securing ring 9 aboveit acts merely to prevent its displacement as no substantial pressure isneeded to hold it 1n its proper position. Thus, no spring is needed tokeep the parts of the cock in proper contact as in ordinary right anglecocks. A

To supply the pilot light tube 10, a hole 1 1 is bored upwardly throughthe projection 12 and the conical plug, to a point above the web 4. The.end of this hole is closed by a screw plug 13 and the passage 11 leadsinto a passage 14 bored into a projection, the end thereof being closedby screw plug 15. For the horizontal turning of the valve casing a bentlever 16 may be provided, this being secured to a projection 17 of thecasing andbeing adapted to be actuated by an operator using a stick orrod and pushing this around horizontally to open or close thevalve. Fig.4 shows the valve casing turned into closed position, the gas, ofcourse, flowing through the pilot ligllit channel, as this isindependent of the coc rThe casing 18 of the lamp may be of anydesirable form, but is arranged to supply air to the mantles.` It isshown as provided with the usual chimney ornamental casings, hood etc.,and is adapted to support a globe 18a. The gas supply pipe 19 leadingfrom the valve casing is screwed into the closed top flange of theburner manifold 20.

As I find there is a decided advantage in mixing the gas and air in avertically eX- tending mixing tube before passingto the burners, I tapoff the gas from the pipe 19 to a side depending tube 21 leading to theupwardly projecting orifice 22 controlled by the needle havinganadjus'table screw 23. The mixer tube 24 is supported directly abovethe jet opening with the air inlet between and this mixer tube leadsupwardly into the manifold 20 vfrom whence the branch arms 25 leadoutwardly and downwardly to the series of burner It will be noted thatthis structure provides for the upward How of the gas and air mixture tothe manifold without any depending boX below and outside of the glassglobe, which would cast shadows and is unsightly. There is a smallcentral hole in the lower end of the globe merely to reach the adjustingscrew for controlling the gas.

The advantages of my invention result from the valve or cock mechanismshown and also from the structure of the gas and air mixture supplysystem.

Many changes may be made in the form and arrangement of the Valve, themethod of actuating the same, the position of the valve, etc., withoutdeparting from my in- Vention.

The gas and air supply system may also be Varied within the scope of mybroader claims.

l claim:

l. In a cluster lamp, a main gas supply pipe forming the support for thelamp, a Valve in said pipe for controlling the flow of gas therethrough,a manifold supported on the lower end of said pipe, a plurality 0fradially extending burner arms connected to said manifold andcommunicating therewith, a mixing tube extending downwardly from saidmanifold and communicating therewith, a Valve casing below said mixingtube having a et orifice directed toward the opening of the mixing tube,a needle Valve within said casing for controlling the flow of gasthrough the j et orifice, and a pipe on the exterior of the manifold andmixing tube connecting the main gas supply with the valve casing;substantially as described.

2. ln a cluster lamp, a main supply pipe, a lamp casing connectedthereto, a va ve for controlling the flow of gas through said pipe, amanifold connected to the lower end of said pipe, a plurality of radialburner arms connected to the manifold and coin-- municating therewith, amixing tube concentric with the main supply pipe connected to the lowerend of the manifold and communicating therewith, an eccentricallydisposed gas pipe connected to the main gas pipe 'above the manifold onthe exterior thereof, a fitting connected to the lower end of theeccentrically disposed gas pipe and supported thereby, there being a jetorifice in said fitting in line with the lower end of the mixing tube, aneedle Valve within said fitting for controlling the supply of gaspassing through the jet orifice, and an adjustable tube telescopicallyengaging the mixing tube and supported from the eccentrically disposedgas pipe; substantially as described.

3. A cluster lamp having a main supply pipe concentric therewith, a lampcasing connected thereto, a manifold connected to the lower end of thesupply pipe but not communicating therewith, a plurality of radiallydisposed burner arms connected to the manifold, a mixing tube connectedto the lower end of the manifold and communieating therewith, saidmixing tube being concentric with the supply pipe, a jet orifice belowthe lower end of the mixing tube for supplying gas to the mixing tube,and a gas supply pipe communicating with the jet orifice and connectedto the main supply' pipe above the manifold, said supply pipe beingeccentric to the main supply pipe and the mixing tube, substantially asdescribed.

ln testimony whereof, l have hereunto set my hand.

THOMAS J AMES LTLE, JR.

VVitnesses z J. H. JOHNSON, EDGAR LENBON.

Gopies of Vthis patent may be obtained for ve cents each, by addressingthe Commissioner of .Patents Washington, D. C.

